EP1046925A1 - Optoelektronische Vorrichtung - Google Patents
Optoelektronische Vorrichtung Download PDFInfo
- Publication number
- EP1046925A1 EP1046925A1 EP00108119A EP00108119A EP1046925A1 EP 1046925 A1 EP1046925 A1 EP 1046925A1 EP 00108119 A EP00108119 A EP 00108119A EP 00108119 A EP00108119 A EP 00108119A EP 1046925 A1 EP1046925 A1 EP 1046925A1
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- EP
- European Patent Office
- Prior art keywords
- optoelectronic device
- evaluation unit
- output
- switches
- monitoring area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000005693 optoelectronics Effects 0.000 title claims abstract description 60
- 238000012544 monitoring process Methods 0.000 claims abstract description 70
- 238000011156 evaluation Methods 0.000 claims abstract description 61
- 238000012360 testing method Methods 0.000 claims abstract description 10
- 230000004888 barrier function Effects 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 3
- 230000004913 activation Effects 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002996 emotional effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
- F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
- F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
- F16P3/14—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
- F16P3/144—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using light grids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/04—Systems determining the presence of a target
Definitions
- the invention relates to an optoelectronic device according to the preamble of claim 1.
- Such a device is known from DE 39 32 344 C2.
- This device has a distance sensor working according to the triangulation principle with a transmitter emitting light rays and a received light rays receiving receiver, which is connected to an evaluation unit is.
- a deflection unit having a deflection mirror the transmitted light beams are deflected so that they periodically cover a monitoring area paint over.
- the objects are positioned by determining the current angular position of the deflection unit as well on the basis of the distance values determined by means of the distance sensor.
- the dimensions of the monitoring area are in the form or the outline of the surveillance area as a result of pairs of distance and Angle values are stored in the evaluation unit.
- the disadvantage here is that only one monitoring area in the evaluation unit is saved.
- different applications often occur on which the optoelectronic device detects of objects within different surveillance areas with different Dimensions becomes necessary.
- the optoelectronic device is particularly used in the field of personal protection, so that the optoelectronic Device must meet safety standards. It is an essential requirement that when selecting suitable monitoring areas a correspondingly high level of error security is guaranteed.
- the invention has for its object in an optoelectronic device a fail-safe selection of different of the type mentioned at the beginning To create surveillance areas.
- the dimensions of different monitoring areas are saved. There are several to select one or more of these monitoring areas Switches each have a supply line at an input of the evaluation unit connected, with each input a saved monitoring area assigned. Pressing a switch indicates the assigned Input a predetermined signal value, which an activation of this Input corresponds. By activating the input, the Input assigned monitoring area activated, which means that the objects in this surveillance area. For testing purposes, a Output of the evaluation unit, a signal value is output on the supply lines, which in the faultless case at the corresponding input of the Evaluation unit pending.
- a major advantage of the device according to the invention is that A fail-safe selection via a single input of the evaluation unit of a certain surveillance area. Failure safety is the output of the signal values at the output of the evaluation unit guarantees which of the evaluation unit's inputs into it be read back and checked. This means a significant reduction the circuit complexity compared to conventional fail-safe circuit arrangements, where the inputs are usually designed redundantly Need to become.
- the optoelectronic device is that to select the individual monitoring areas almost any switch can be used.
- these switches can be used as relays and as outputs from controls, such as PLC controls, be trained. The selection can be made centrally via such controls of the surveillance areas.
- the switches can also be used as binary sensors can be formed, for example by light barriers or proximity switches are formed. These sensors can, for example on machines, and to determine the current position of a serve on the machine movable machining center.
- the optoelectronic The device is then attached to the machine so that the Is monitored in front of the machine. Depending on the position of the machining center one of the switches on the machine is operated, which is followed by optoelectronic Device a suitable monitoring area is selected.
- Switching between two monitoring areas is particularly advantageous in such a way that when a switch is actuated first a second one Switch is operated so that objects in two different for a transition period Surveillance areas are captured. Only then is the reset carried out of the first switch, so that only the monitoring area that is connected to the second Switch is selected, is still active. In this way, the Switch between two surveillance areas no time gap in which no surveillance area is activated. In such a gap no object can be detected with the optoelectronic device, resulting in a Safety risk for people in the vicinity of the machine.
- FIG. 1 shows an exemplary embodiment of an optoelectronic device 1 for capturing objects.
- the optoelectronic device 1 has one Distance sensor with a transmitter light beam 2 emitting transmitter 3 and one Receiving light beams 4 receiving receiver 5.
- the transmitter 3 consists preferably of a laser diode, which is used for beam shaping Transmitting light beams 2 is a transmission optics 6 downstream.
- the receiver 5 is for example formed by a pin photodiode, which has a receiving optics 7 is upstream.
- the distance measurement can be based on the principle of phase measurement respectively.
- the laser diode is operated in CW mode, whereby an amplitude modulation is impressed on the transmitted light beams 2.
- the distance information is obtained by comparing the phase positions the emitted transmission light beams 2 and that reflected back by an object and received light beams 4 impinging on the receiver 5.
- the evaluation unit 8 is in the present embodiment of one Microcontroller formed.
- the distance measurement can also be carried out using the pulse transit time method.
- 3 short transmission light pulses are emitted by the transmitter.
- the distance information is in this case by direct measurement of the transit time a transmitted light pulse to an object and back to the receiver 5 won.
- the transmitted 2 and received light beams 4 are guided via a deflection unit 9.
- the deflection unit 9 has a deflection mirror 10, which is on a rotatable, driven by a motor 11 base 12.
- the Deflecting mirror 10 thereby rotates by a predetermined speed vertical axis of rotation D.
- the transmitter 3 and the receiver 5 are in the axis of rotation D arranged above the deflecting mirror 10.
- the deflecting mirror 10 is inclined at 45 ° with respect to the axis of rotation D, so that the transmitted light beams 2 reflected at the deflection mirror 10 in a horizontal manner Are guided in the direction out of the device 1.
- the housing 14 is essentially cylindrical, the exit window 13 over a Angle range extends from 180 °. Accordingly, how particular can be seen from Figure 2, with the transmitted light beams 2 a semicircular flat surface scanned, in which objects can be detected.
- the one from the Objects reflecting back reflected light rays 4 in a horizontal Direction the exit window 13 and are above the deflecting mirror 10 led to the receiver 5.
- the current encoder continuously connected to the evaluation unit 8 Angular position of the deflection unit 9 is detected. From the angular position and the distance value registered in this angular position is in the evaluation unit 8 determines the position of an object.
- Such optoelectronic devices 1 are also used in particular Area of personal protection used, whereby to fulfill the safety-related
- the evaluation unit 8 requires a redundant structure having.
- An example of such a monitoring area 15 is shown in Figure 2. In this case, the surveillance area 15 formed by a rectangular flat surface. Once an object or a If someone enters this monitoring area 15, an object message is issued. This object message can be used, for example, to switch off a machine, whose apron is monitored with the optoelectronic device 1 will be used.
- the dimensions of the monitoring area 15 are in the evaluation unit 8 saved as a parameter set. That of the device 1 of an object Registered position values are stored in the evaluation unit 8 with the Monitoring area 15 compared. Based on this comparison it is judged whether the object has entered the monitoring area 15. If this is the case, the object message is output.
- FIG. 3 a - d Such an application example is shown in Figures 3 a - d.
- the case is the optoelectronic device 1 on a front of a machine 16 attached, which is movably mounted on rails 17.
- the machine 16 can be from a machine tool, a press brake or the like be formed, the apron for security purposes by means of the optoelectronic Device 1 is monitored.
- the dimensioning of the monitoring area 15 depends on the Position of the machine 16 on the rails 17.
- the machine 16 is in one first end position. In this end position, transmitted light beams 18 hit one Transmitter 19 of a first light barrier to the assigned receiver 20 this light barrier.
- This light barrier thus forms a limit switch Detection of the first end position of the machine 16.
- the receiver 20 of the Light barrier is arranged at one end of the machine 16 while the transmitter 19 is arranged stationary in front of the machine 16. In this position the machine 16, the objects within a first, shown in Figure 3a Monitoring area 15 of the optoelectronic device 1 be recorded.
- the receiver 20 of the light barrier is connected to a controller, not shown connected in the machine 16, which the movement of the machine 16th controls along the rails 17.
- the optoelectronic is also connected to this control Device 1 connected.
- the machine 16 moves the rails 17 from the first end position towards a second end position, machine 16 being controlled by the controller. While this movement of the machine 16 are by means of the optoelectronic Device 1 objects in the second monitoring area shown in Figure 3b 15 to capture.
- the machine 16 is in one second end position, which is monitored by means of a second light barrier becomes.
- the emitting light beam 21 Transmitter 22 of the light barrier stationary in front of the machine 16, while the receiver 23 is arranged on the machine 16, so that in the second end position the machine 16, the transmission light beams 21 emitted by the transmitter 22 onto the Meet receiver 23.
- the optoelectronic Device 1 objects within the third shown in Figure 3c Monitoring area 15 can be detected.
- Monitoring areas 15 are stored in the optoelectronic device 1.
- a monitoring area can be created by switching over 15 are activated so that by means of the optoelectronic device 1 Objects in this monitoring area 15 are detected. Switching between different monitoring areas 15 takes place by means of Switches S1 - S4.
- FIG. 4 shows an embodiment of the connection scheme for the connection the switch S1-S4 to the evaluation unit 8 of the optoelectronic device 1.
- Each input E1 - E4 is a saved one Monitoring area 15 assigned, so that a total of switching between four different monitoring areas 15 is possible.
- In principle can also have fewer or more switches S1 - SN each at one input E1 - EN of the evaluation unit 8 can be connected, so that a total a number N of monitoring areas 15 can be selected.
- Switches S1 - S4 can be used by relays, control outputs or also from binary sensors, such as light barriers or proximity switches be educated.
- the two other switches S2, S4 are each from an output of the control the machine 16 is formed.
- Each of the switches S1-S4 is connected to an input E1 via a feed line Z1-Z4 - E4 of the evaluation unit 8 connected, with Z1 - Z4 in each supply line one resistor 24, 25, 26, 27 and one optocoupler 28, 29, 30, 31 in a row are switched.
- the inputs are through the optocouplers 28 - 31 E1 - E4 of the evaluation unit 8 are galvanically isolated from the switches S1 - S4.
- Between the optocouplers 28 - 31 and the inputs E1 - E4 of the evaluation unit 8 is also an arrangement of further resistors 32, 33, 34, 35 switched.
- the leads Z1 - Z4 suppressor diodes 36, 37, 38, 39 connected to protect against transient overvoltages.
- a specific monitoring area 15 is selected by actuation of the corresponding switch S1, S2, S3 or S4.
- By pressing the Switch S1, S2, S3 or S4 is on the corresponding supply line Z1, Z2, Z3 or Z4 to a supply voltage VCC.
- VCC voltage
- the suppressor diodes 36-39 can supply voltage VCC in one wide range, typically varying between 16 and 30 volts nevertheless a constant current through the downstream optocoupler 28, 29, 30 or 31 flows.
- the corresponding input E1, E2, E3 or E4 in the evaluation unit 8 is activated by this current.
- the input E1-E4 can have two signal values 0 "and 1 ", with the signal value when the input E1, E2, E2 or E4 is activated 0 "is pending.
- the circuit arrangement can be output A of the evaluation unit 8 to connect switches S1 - S4 to evaluation unit 8, the testing is preferably carried out cyclically.
- the evaluation unit 8 via output A to leads Z1 - Z4 certain signal value is output, which via inputs E1 - E4 in the Evaluation unit 8 is read back. Correct operation is then an issue before, if the read out via the output A on the supply lines Z1 - Z4 Signal values are received again at the corresponding inputs E1 - E4.
- the safety requirements for the use of optoelectronic device 1 in the field of personal protection are assumed to be fulfilled. Is particularly advantageous in the Circuit arrangement according to the invention that the leads Z1 - Z4 between a switch S1 - S4 and the evaluation unit 8 are not designed redundantly must be in order to meet the safety requirements.
- the mode of operation of the circuit arrangement according to FIG. 4 is illustrated in the pulse diagram according to FIG. 5.
- time t 1 only switch S2 is actuated, so that supply voltage VCC is present on supply line Z2.
- the other switches S1, S3, S4 are not actuated, so that the voltage value 0 is present on the leads Z1, Z3, Z4.
- only input E2 of evaluation unit 8 is activated, so that signal value 0 is present there.
- Signal value 1 is present at the other inputs E1, E3, E4, so that they are deactivated. Therefore, only the second monitoring area 15 is activated by the activation of the second input E2 until the time t 1 , so that objects in this monitoring area 15 are detected with the optoelectronic device 1.
- This case corresponds, for example, to the arrangement shown in FIG. 3b the machine 16.
- the machine 16 moves between the first and the second end position, so that the light paths of the two light barriers, which form the switches S1 and S3, interrupted and therefore not actuated are.
- the journey to the second end position of the machine 16 is only an output of the control, which forms the switch S2, operated.
- the other, output forming switch S4 for driving machine 16 in reverse In this case, direction is also not activated.
- the monitoring area 15 is switched over by operating switch S3 in addition to switch S2, as a result of which supply voltage VCC is also present on supply line Z3. Accordingly, the signal values 0 are present at the inputs E2 and E3 at the same time, so that the second and third monitoring areas 15 are simultaneously activated in the evaluation unit 8, so that objects are simultaneously detected in the second and third monitoring areas 15 with the optoelectronic device 1.
- This case corresponds to moving the machine 16 into the second end position, which is shown in FIG. 3c.
- the output of the control forming the switch S2 is still activated, however, the transmission light beams 21 of the transmitter 22 of the second light barrier already strike the assigned receiver 23, so that the switch S3 is already actuated.
- the machine 16 is stopped for times greater than t 2 , the output of the control forming the switch S2 is thus no longer actuated, while, as shown in FIG. 3c, the switch S3 formed by the second light barrier is actuated. The movement of the machine 16 into the second end position is thus completed. Accordingly, input E2 is deactivated so that signal value 1 is present there, whereas input E3 remains activated. This completes the switching process between the second and third monitoring areas 15, so that objects are only detected in the third monitoring area 15 as shown in FIG. 3c.
- the switchover between the two monitoring areas according to the invention 15 has the advantage that no temporal during the switching process Gap arises in which no monitoring area 15 is activated. If no monitoring area 15 is activated, this corresponds to a specification of a monitoring area 15 with the area zero, so that with the optoelectronic device 1 no longer detects objects. This could cause objects or people to immediately go undetected the optoelectronic device 1 and thus in the danger zone of the machine 16 could stop what is a danger to the operating personnel of the Machine 16 would represent.
- the optoelectronic device 1 allows several monitoring areas 15 to be activated simultaneously during the switching process.
- the permissible range N min N N N N max preferably being in the range 1 N N 2 2. This means that either only the activation of one monitoring area 15 or at most the activation of two monitoring areas 15 is permitted. If more or less than the permissible number of monitoring areas 15 are activated via the switches S1-S4 connected to the evaluation unit 8, an error message is output in the optoelectronic device 1, whereupon, for example, the connected machine 16 is switched off for safety reasons.
- This target time is preferably chosen application-specifically and defines the Maximum duration over which the switching process between different Monitoring areas 15 may extend. If this target time is exceeded, so there is also an error message.
- the functionality of the optocouplers 28-31, the resistors 32-35 and the inputs E1-E4 of the circuit arrangement according to FIG. 4 can be checked.
- the functions of the switches S1-S4 and the feed lines Z1-Z4 can also be checked by checking the bit pattern at the inputs E1-E4 when the monitoring area changes.
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- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Geophysics And Detection Of Objects (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
Description
- Figur 1:
- Schematische Darstellung eines Ausführungsbeispiels der optoelektronischen Vorrichtung.
- Figur 2:
- Schematische Darstellung eines mittels der optoelektronischen Vorrichtung gemäß Figur 1 überwachten Überwachungsbereichs.
- Figur 3:
- Anordnung einer optoelektronischen Vorrichtung an einer auf einer
Schiene verfahrbaren Maschine
- a) in einer ersten Endposition der Maschine bei einem ersten von der optoelektronischen Vorrichtung überwachten Überwachungsbereich,
- b) während der Fahrt der Maschine von der ersten zur zweiten Endposition bei einem zweiten von der optoelektronischen Vorrichtung überwachten Überwachungsbereich,
- c) in einer zweiten Endposition der Maschine bei einem dritten von der optoelektronischen Vorrichtung überwachten Überwachungsbereich,
- d) während der Fahrt der Maschine von der zweiten zur ersten Endposition bei einem vierten von der optoelektronischen Vorrichtung überwachten Überwachungsbereich.
- Figur 4:
- Anschlußschema für den Anschluß mehrerer Schalter an die Auswerteeinheit der optoelektronischen Vorrichtung gemäß Figur 1.
- Figur 5:
- Impulsdiagramm für das Anschlußschema gemäß Figur 4.
Claims (19)
- Optoelektronische Vorrichtung zum Erfassen von Objekten in einem Überwachungsbereich mit einem Distanzsensor, welcher einen Sendelichtstrahlen emittierenden Sender und einen Empfangslichtstrahlen empfangenden Empfänger aufweist, einer Auswerteeinheit zur Auswertung der am Empfänger anstehenden Empfangssignale und einer Ablenkeinheit, an welcher die Sendelichtstrahlen abgelenkt werden, so daß diese periodisch den Überwachungsbereich überstreichen, dadurch gekennzeichnet, daß in der Auswerteeinheit (8) die Abmessungen verschiedener Überwachungsbereiche (15) abgespeichert sind, daß mehrere Schalter (S1 - S4) über jeweils eine Zuleitung (Z1 - Z4) an einen Eingang (E1 - E4) der Auswerteeinheit (8) angeschlossen sind, wobei jedem Eingang (E1 - E4) ein abgespeicherter Überwachungsbereich (15) zugeordnet ist, daß durch Betätigen eines Schalters (S1 - S4) am zugeordneten Eingang (E1 - E4) ein vorgegebener Signalwert zu dessen Aktivierung anlegbar ist, wodurch der zugeordnete abgespeicherte Überwachungsbereich (15) aktiviert ist, so daß die Objekte in diesem Überwachungsbereich (15) erfaßt werden, und daß zu Testzwecken über einen Ausgang A der Auswerteeinheit (8) auf die Zuleitungen (Z1 - Z4) jeweils ein vorgegebener Signalwert ausgebbar ist, welcher im fehlerfreien Fall an dem entsprechenden Eingang (E1 - E4) der Auswerteeinheit (8) ansteht.
- Optoelektronische Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Ausgabe der Signalwerte über den Ausgang A zu Testzwecken zyklisch erfolgt.
- Optoelektronische Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß bei auf die Zuleitungen (Z1 - Z4) zu Testzwecken von dem Ausgang A der Auswerteeinheit (8) ausgegebenen Signalwerten die Eingänge (E1 - E4) der Auswerteeinheit (8) im fehlerfreien Fall deaktiviert sind.
- Optoelektronische Vorrichtung nach einem der Ansprüche 1 - 3, dadurch gekennzeichnet, daß eine Fehlermeldung erfolgt, falls bei auf die zu Testzwecken vom Ausgang A der Auswerteeinheit (8) ausgegebenen Signalwerten wenigstens einer der Eingänge (E1 - E4) der Auswerteeinheit (8) aktiviert ist.
- Optoelektronische Vorrichtung nach einem der Ansprüche 1 - 4, dadurch gekennzeichnet, daß zum Wechsel eines Überwachungsbereichs (15) ein nicht betätigter Schalter (S1 - S4) betätigt wird und darauf ein zweiter betätigter Schalter (S1 - S4) zurückgesetzt wird.
- Optoelektronische Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß eine Fehlermeldung erfolgt, falls beide Schalter länger als eine vorgegebene Sollzeit gleichzeitig aktiviert sind.
- Optoelektronische Vorrichtung nach einem der Ansprüche 1 - 6, dadurch gekennzeichnet, daß gleichzeitig eine vorgegebene Anzahl N von Schaltern betätigt ist, so daß eine Erfassung von Objekten in N verschiedenen Überwachungsbereichen (15) erfolgt.
- Optoelektronische Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die vorgegebene Anzahl N von gleichzeitig betätigbaren Schaltern in einem Bereich Nmin ≤ N ≤ Nmax liegt, und daß bei gleichzeitigem Betätigen von N Schaltern außerhalb dieses Bereichs eine Fehlermeldung erfolgt.
- Optoelektronische Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß als Bereich gleichzeitig betätigbarer Schalter Nmin = 1 und Nmax = 2 gewählt ist.
- Optoelektronische Vorrichtung nach einem der Ansprüche 1 - 9, dadurch gekennzeichnet, daß vier Schalter (S1 - S4) an die Auswerteeinheit (8) angeschlossen sind.
- Optoelektronische Vorrichtung nach einem der Ansprüche 1 - 10, dadurch gekennzeichnet, daß die Schalter (S1 - S4) von Relais oder von Ausgängen einer Steuerung gebildet sind.
- Optoelektronische Vorrichtung nach einem der Ansprüche 1 - 11, dadurch gekennzeichnet, daß die Schalter (S1 - S4) von binären Sensoren, insbesondere Lichtschranken oder Näherungsschaltern, gebildet sind.
- Optoelektronische Vorrichtung nach einem der Ansprüche 1 - 12, dadurch gekennzeichnet, daß bei einem betätigten Schalter (S1 - S4) auf der entsprechenden Zuleitung (Z1 - Z4) eine Versorgungsspannung VCC anliegt.
- Optoelektronische Vorrichtung nach Anspruch 13, dadurch gekennzeichnet, daß die Versorgungsspannung innerhalb eines Bereichs von 16 V bis 30V variiert.
- Optoelektronische Vorrichtung nach einem der Ansprüche 13 oder 14, dadurch gekennzeichnet, daß an die Zuleitungen (Z1 - Z4) unidirektionale Supressor-Dioden (36, 37, 38, 39) zum Schutz gegen transiente Überspannungen angeschlossen sind.
- Optoelektronische Vorrichtung nach einem der Ansprüche 1 - 16, dadurch gekennzeichnet, daß die vom Ausgang A der Auswerteeinheit (8) zu Testzwecken ausgegebenen Signalwerte jeweils gleichzeitig über eine Anordnung von Dioden (41, 42 ,43, 44) auf die Zuleitungen (Z1 - Z4) ausgebbar sind.
- Optoelektronische Vorrichtung nach einem der Ansprüche 1 - 17, dadurch gekennzeichnet, daß die Eingänge (E1 - E4) und der Ausgang A der Auswerteeinheit (8) über Optokoppler (28, 29, 30, 31, 40) von den angeschlossenen Schaltern (S1 - S4) galvanisch getrennt sind.
- Optoelektronische Vorrichtung nach einem der Ansprüche 1 - 18, dadurch gekennzeichnet, daß die Auswerteeinheit (8) von einem Mikrocontroller gebildet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19917509A DE19917509C1 (de) | 1999-04-17 | 1999-04-17 | Optoelektronische Vorrichtung |
DE19917509 | 1999-04-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1046925A1 true EP1046925A1 (de) | 2000-10-25 |
EP1046925B1 EP1046925B1 (de) | 2007-10-24 |
Family
ID=7904993
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP00108119A Expired - Lifetime EP1046925B1 (de) | 1999-04-17 | 2000-04-13 | Optoelektronische Vorrichtung |
Country Status (3)
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US (1) | US6265725B1 (de) |
EP (1) | EP1046925B1 (de) |
DE (2) | DE19917509C1 (de) |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE50114296D1 (de) * | 2000-07-27 | 2008-10-23 | Leuze Electronic Gmbh & Co Kg | Optoelektronische Vorrichtung |
DE10211387B4 (de) * | 2001-03-15 | 2020-03-26 | Omron Corp. | Strahlungsimpulse verwendender Sensor |
EP1298449A3 (de) * | 2001-09-21 | 2005-04-27 | Leuze electronic GmbH + Co. | Optischer Sensor |
DE10152543A1 (de) * | 2001-10-24 | 2003-05-08 | Sick Ag | Verfahren und Vorrichtung zum Steuern einer sicherheitsrelevanten Funktion einer Maschine |
DE10153270A1 (de) * | 2001-10-29 | 2003-05-08 | Sick Ag | Optoelektronische Entfernungsmesseinrichtung |
DE10155534B4 (de) * | 2001-11-12 | 2006-04-20 | Leuze Electronic Gmbh & Co Kg | Optoelektronische Vorrichtung |
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EP3217195B1 (de) | 2016-03-08 | 2023-04-26 | Leuze electronic GmbH + Co KG | Optischer sensor |
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- 2000-04-13 EP EP00108119A patent/EP1046925B1/de not_active Expired - Lifetime
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Also Published As
Publication number | Publication date |
---|---|
DE50014725D1 (de) | 2007-12-06 |
US6265725B1 (en) | 2001-07-24 |
DE19917509C1 (de) | 2000-05-25 |
EP1046925B1 (de) | 2007-10-24 |
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